compiler standards (and/or min gcc version) supported with installed headers ?

[Mike Frysinger]

On Friday 04 January 2013 11:29:34 Andreas Jaeger wrote:
> * glibc needs a recent GCC compiler version to build itself (right now
>    "requires GCC version 4.3 or newer to build; GCC 4.6 is
>    recommended.")
> ...
>    - The header files for glibc use GCC 4.3 as baseline for
>      optimizations

should we just lock this version to whatever version we have locked for 
building ?  i.e. when we start requiring a newer gcc to build (e.g. 4.8), we 
also say that we use that as the baseline for optimizations ?
-mike
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